Texas Instruments Titanium TI-89, User Manual

Page: 334 / 977

Polar Graphing 331
ƒ
9
– or –
8
Í
to set
Coordinates = POLAR
. If
Coordinates = RECT
, the polar equations will be graphed
properly, but coordinates will be displayed as x and y.
When you trace a polar equation, the
q
coordinate is shown even if
Coordinates = RECT
.
Exploring a Graph
As in function graphing, you can explore a graph by using the following tools. Any
displayed coordinates are shown in polar or rectangular form as set in the graph format.
Tool For Polar Graphs:
Free-Moving
Cursor Works just as it does for function graphs.
„
Zoom
Works just as it does for function graphs.
• Only
x
(
xmin
,
xmax
,
xscl
) and
y
(
ymin
,
ymax
,
yscl
)
Window variables are affected.
• The q Window variables ( q min , q max , q step ) are not
affected unless you select 6:ZoomStd (which sets
q min = 0
,
q max = 2 p
, and
q step = p /24
).